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Evidence of recombination in the Banana bunchy top virus genome. 2011

Muhammad Zeeshan Hyder, and Shahzad Hussain Shah, and Shahid Hameed, and Syed Muhammad Saqlan Naqvi
Department of Biosciences, COMSATS Institute of Information Technology Islamabad, Islamabad 44000, Pakistan.

Viruses serve as good model for evolutionary studies, owing to their short generation times and small genomes. Banana bunchy top virus (BBTV) is a significant subject being multicomponent circular single stranded DNA virus. BBTV belongs to family Nanoviridae and contains DNA-R, -U3, -S, -M, -C, and -N as integral genomic components. Evolutionary studies have shown genetic re-assortment of components among its isolates and revealed a concerted type evolution in non-coding regions of its genome. The DNA U3 having been shown as the most diverse component in our previous studies, was subjected to sequencing from some Pakistani isolates for the first time. Sequence analysis revealed intergenomic recombination in DNA-U3 among the isolates of two sub-groups and a very rare intragenomic recombination in Pakistani BBTV population. This indicates that like other evolutionary processes including intergenomic recombination, intragenomic recombination among the genomic components of the same isolate may also have a significant contribution in the evolution of BBTV genome. Intragenomic recombination therefore appears to be a unique way to generate genetic diversity in the multicomponent ssDNA viruses.

UI MeSH Term Description Entries
D010802 Phylogeny The relationships of groups of organisms as reflected by their genetic makeup. Community Phylogenetics,Molecular Phylogenetics,Phylogenetic Analyses,Phylogenetic Analysis,Phylogenetic Clustering,Phylogenetic Comparative Analysis,Phylogenetic Comparative Methods,Phylogenetic Distance,Phylogenetic Generalized Least Squares,Phylogenetic Groups,Phylogenetic Incongruence,Phylogenetic Inference,Phylogenetic Networks,Phylogenetic Reconstruction,Phylogenetic Relatedness,Phylogenetic Relationships,Phylogenetic Signal,Phylogenetic Structure,Phylogenetic Tree,Phylogenetic Trees,Phylogenomics,Analyse, Phylogenetic,Analysis, Phylogenetic,Analysis, Phylogenetic Comparative,Clustering, Phylogenetic,Community Phylogenetic,Comparative Analysis, Phylogenetic,Comparative Method, Phylogenetic,Distance, Phylogenetic,Group, Phylogenetic,Incongruence, Phylogenetic,Inference, Phylogenetic,Method, Phylogenetic Comparative,Molecular Phylogenetic,Network, Phylogenetic,Phylogenetic Analyse,Phylogenetic Clusterings,Phylogenetic Comparative Analyses,Phylogenetic Comparative Method,Phylogenetic Distances,Phylogenetic Group,Phylogenetic Incongruences,Phylogenetic Inferences,Phylogenetic Network,Phylogenetic Reconstructions,Phylogenetic Relatednesses,Phylogenetic Relationship,Phylogenetic Signals,Phylogenetic Structures,Phylogenetic, Community,Phylogenetic, Molecular,Phylogenies,Phylogenomic,Reconstruction, Phylogenetic,Relatedness, Phylogenetic,Relationship, Phylogenetic,Signal, Phylogenetic,Structure, Phylogenetic,Tree, Phylogenetic
D010944 Plants Multicellular, eukaryotic life forms of kingdom Plantae. Plants acquired chloroplasts by direct endosymbiosis of CYANOBACTERIA. They are characterized by a mainly photosynthetic mode of nutrition; essentially unlimited growth at localized regions of cell divisions (MERISTEMS); cellulose within cells providing rigidity; the absence of organs of locomotion; absence of nervous and sensory systems; and an alternation of haploid and diploid generations. It is a non-taxonomical term most often referring to LAND PLANTS. In broad sense it includes RHODOPHYTA and GLAUCOPHYTA along with VIRIDIPLANTAE. Plant
D011995 Recombination, Genetic Production of new arrangements of DNA by various mechanisms such as assortment and segregation, CROSSING OVER; GENE CONVERSION; GENETIC TRANSFORMATION; GENETIC CONJUGATION; GENETIC TRANSDUCTION; or mixed infection of viruses. Genetic Recombination,Recombination,Genetic Recombinations,Recombinations,Recombinations, Genetic
D014644 Genetic Variation Genotypic differences observed among individuals in a population. Genetic Diversity,Variation, Genetic,Diversity, Genetic,Diversities, Genetic,Genetic Diversities,Genetic Variations,Variations, Genetic
D016679 Genome, Viral The complete genetic complement contained in a DNA or RNA molecule in a virus. Viral Genome,Genomes, Viral,Viral Genomes
D017422 Sequence Analysis, DNA A multistage process that includes cloning, physical mapping, subcloning, determination of the DNA SEQUENCE, and information analysis. DNA Sequence Analysis,Sequence Determination, DNA,Analysis, DNA Sequence,DNA Sequence Determination,DNA Sequence Determinations,DNA Sequencing,Determination, DNA Sequence,Determinations, DNA Sequence,Sequence Determinations, DNA,Analyses, DNA Sequence,DNA Sequence Analyses,Sequence Analyses, DNA,Sequencing, DNA
D052658 Babuvirus A genus in the family NANOVIRIDAE infecting bananas. The type species is Banana bunchy top virus. Banana bunchy top virus,Babuviruses
D055029 Inverted Repeat Sequences Copies of nucleic acid sequence that are arranged in opposing orientation. They may lie adjacent to each other (tandem) or be separated by some sequence that is not part of the repeat (hyphenated). They may be true palindromic repeats, i.e. read the same backwards as forward, or complementary which reads as the base complement in the opposite orientation. Complementary inverted repeats have the potential to form hairpin loop or stem-loop structures which results in cruciform structures (such as CRUCIFORM DNA) when the complementary inverted repeats occur in double stranded regions. Hairpin Loop Sequence,Inverted Repeat Sequence,Inverted Tandem Repeats,Palindromic Repeat Sequences,Sequence Palindromes,Stem-Loop Sequence,Hairpin Loop Sequences,Inverted Tandem Repeat,Palindrome, Sequence,Palindromes, Sequence,Palindromic Repeat Sequence,Repeat Sequence, Inverted,Repeat Sequence, Palindromic,Repeat Sequences, Inverted,Repeat Sequences, Palindromic,Repeat, Inverted Tandem,Repeats, Inverted Tandem,Sequence Palindrome,Sequence, Hairpin Loop,Sequence, Inverted Repeat,Sequence, Palindromic Repeat,Sequence, Stem-Loop,Sequences, Hairpin Loop,Sequences, Inverted Repeat,Sequences, Palindromic Repeat,Sequences, Stem-Loop,Stem Loop Sequence,Stem-Loop Sequences,Tandem Repeat, Inverted,Tandem Repeats, Inverted
D019143 Evolution, Molecular The process of cumulative change at the level of DNA; RNA; and PROTEINS, over successive generations. Molecular Evolution,Genetic Evolution,Evolution, Genetic

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